Why confine Jackson to Brigade or Division? I think he should be included in the list of Patton and Lee. In my opinion, the Valley Campaign alone solidly puts him there.
He earned the spot, I agree, and he certainly outshone several of those who outlived them [Bragg and Hood, just off the top of my head]
But as the commander of Virginia's First Brigade he made it what it was, and as that Brigade's creator and leader, set the textbook example for those tasked with that job. He did indeed go on to greater things, but he may well have been the finest brigade commander who ever lived, and most certainly is near the top of any respectable list of great brigadeers of any time.